I don't think anyone really goes to RA for sushi. It's lovely that the food is delicious but if you are a local, all the Whoo-haw is about happy hour. I haven't visited since I was fresh out of High School and I went back a couple months ago. The morale has definitely been maintained.
Group visits are the best. You can have dinner with cocktails, eat too much and hit up the bar for a beer on your way out. It's sexy with all those red lanterns hanging about but hell, it's Vegas and that's to be expected.
It's centrally located in the Fashion Show Mall so you could make a day of it to avoid the heat. Shop a bit, and take a cab back to your hotel for a nap with no trouble. Cab rides from there cost $8 - $15 depending on how far South you are on Las Vegas Blvd. Any further North and you end up downing Royal Flushes at the penny slots in the Fitzgeralds. ( No!)
Location ....is the saying?